Asteroids

2015TC25 help

Last update: 2025-04-10 00:47 UTC

Orbital Properties

Epoch

60800.0

MJD

Orbit type

Apollo

Perihelion (q)

0.909

Aphelion (Q)

1.148

Eccentricity (e)

0.116

Inclination (i)

3.7

deg

Orbit period (P)

380.9

Earth MOID

0.00129

U parameter

3.6

A₁

162091.6

10^-15au/days²

A₂

-4416.8

10^-15au/days²

Next Earth close approach

Date

2039-10-06

Nominal distance (from Earth center)

0.07562

11312370

Maximum Brightness

26.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

29.3

mag

Diameter

4 - 8*

Taxonomic type

Rotation period (T)

0.03715

Discovery Information

Discovery Date

2015-10-11

Observatory

Catalina Sky Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.028396

1-sigma variation

0.000001

Unit

Eccentricity (e)

Value

0.116258

1-sigma variation

2.478E-7

Unit

Inclination (i)

Value

3.7435

1-sigma variation

6.423E-6

Unit

Long. of Ascending Node (Ω)

Value

18.8542

1-sigma variation

4.079E-6

Unit

Arg. of Perihelion (ω)

Value

80.5649

1-sigma variation

3.513E-5

Unit

Mean Anomaly (M)

Value

352.40365

1-sigma variation

0.00211

Unit

Perihelion distance

Value

0.908837

1-sigma variation

Unit

Aphelion distance

Value

1.147955

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.002285

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.032595

1-sigma variation

Unit

MOID

Value

0.001285

1-sigma variation

Unit

Orbit Period

Value

380.9245

1-sigma variation

Unit

U parameter

Value

3.6

1-sigma variation

Unit

A₁

Value

162091.62893

1-sigma variation

19365.45466

Unit

10^-15au/days²

A₂

Value

-4416.83954

1-sigma variation

2631.56000

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₁	A₂
a	8.18491E-13	-6.82512E-14	-1.82279E-12	-1.55489E-12	2.95419E-11	-1.89895E-9	8.12789E-3	2.35626E-3
e	-6.82512E-14	6.13886E-14	1.44185E-12	2.46352E-13	-3.03208E-12	1.67521E-10	-3.87272E-3	-2.79960E-4
i	-1.82279E-12	1.44185E-12	4.12603E-11	7.40130E-12	-9.64970E-11	4.68437E-9	-1.08113E-1	-7.38465E-3
Ω	-1.55489E-12	2.46352E-13	7.40130E-12	1.66396E-11	-8.94940E-11	4.00223E-9	-4.68788E-2	-4.95627E-3
ω	2.95419E-11	-3.03208E-12	-9.64970E-11	-8.94940E-11	1.23416E-9	-7.06951E-8	4.59592E-1	8.75373E-2
M	-1.89895E-9	1.67521E-10	4.68437E-9	4.00223E-9	-7.06951E-8	4.43364E-6	-2.10964E1	-5.50145E0
A₁	8.12789E-3	-3.87272E-3	-1.08113E-1	-4.68788E-2	4.59592E-1	-2.10964E1	3.75021E8	2.95527E7
A₂	2.35626E-3	-2.79960E-4	-7.38465E-3	-4.95627E-3	8.75373E-2	-5.50145E0	2.95527E7	6.92510E6

Date of computation: 2025-03-29 00:36 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

0.03715

Unit

Source

[1]

Quality

Value

Unit

Source

[1]

Amplitude

Value

0.4

Unit

mag

Source

[1]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

29.338

Unit

mag

Source

[2]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[3]

Diameter

Value

4 - 8*

Unit

Source

[3]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[4]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) Reddy. V.; Sanchez, J.A.; Bottke, W.F.; Thirouin, A.; et al. (2017) Astron. J. 152, A162.
[2]	ESA Aegis	ESA orbit determination and impact monitoring system
[3]	Estimation	Estimated from absolute magnitude
[4]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

562

Unit

Source

[1]

Unobserved

Value

2911

Unit

Source

[1]

Normalized RMS of residuals

Value

0.476827

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2015-10-11.29013

Unit

Source

[2]

Last Observation

Value

2017-04-25.246963

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

46 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2015-10-17

Unit

Source

[3]

Last Observation

Value

2015-10-18

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 2015TC25 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1969-10-06 23:56	> 1 mo	0.0521498	0.0014862	7.4747061
EARTH	1970-04-22 04:00	> 1 mo	0.1962715	0.0576066	2.6108812
EARTH	1977-10-23 06:55	> 1 mo	0.0257283	0.0020549	0.7410782
EARTH	1978-03-30 06:01	> 1 mo	0.1607356	0.0456393	0.4777988
EARTH	1986-02-16 06:13	> 1 mo	0.1156063	0.0179382	0.9683797
EARTH	2000-10-30 01:52	> 1 mo	0.0348869	0.0038486	0.1092889
EARTH	2001-03-23 07:27	> 1 mo	0.1527983	0.0421398	0.0910571
EARTH	2015-10-13 07:31	< 1 min	0.0007410	0.0007194	0.0000075
EARTH	2016-07-02 00:17	< 1 min	0.1498448	0.1498436	0.0000004
EARTH	2017-03-26 14:52	2.2	0.0196166	0.0196153	0.0000004
EARTH	2039-10-06 11:28	1030.9	0.0756185	0.0343107	0.0137786
EARTH	2040-07-31 23:03	> 1 w	0.1370156	0.1278499	0.0030707
EARTH	2041-01-21 08:07	> 1 w	0.0940584	0.0860692	0.0026668
EARTH	2041-04-29 12:19	> 1 w	0.0986527	0.0778347	0.0072378
EARTH	2042-04-01 05:26	565.5	0.1468844	0.1200829	0.0089480
EARTH	2064-10-01 11:55	> 1 d	0.1424236	0.0132687	0.0432958
EARTH	2065-09-02 16:33	> 1 mo	0.1075764	0.0435924	0.0268746
EARTH	2065-12-06 16:46	> 1 mo	0.0898916	0.0586488	0.0145610
EARTH	2066-05-27 22:04	> 1 mo	0.1307342	0.0958240	0.0133681
EARTH	2067-03-29 02:29	> 1 d	0.0804359	0.0170508	0.0360081
EARTH	2089-10-09 12:00	> 1 w	0.0147360	0.0010771	0.2144362
EARTH	2090-07-31 08:56	> 1 mo	0.1321662	0.0169531	0.2685168
EARTH	2091-01-15 04:31	> 1 mo	0.1003019	0.0212778	0.1862482
EARTH	2091-05-18 05:29	> 1 mo	0.1123757	0.0809031	0.5698424
EARTH	2092-04-02 02:38	306.0	0.0593759	0.0073057	2.1841732
EARTH	2120-10-07 08:36	> 1 mo	0.0693409	0.0014894	9.0303847
EARTH	2121-08-26 11:14	> 1 mo	0.1125158	0.0545952	3.5366278
EARTH	2121-12-16 04:57	> 1 mo	0.0968152	0.0562928	1.8151305
EARTH	2122-06-09 16:16	> 1 mo	0.1313627	0.0621385	1.6641886
EARTH	2123-04-02 02:31	> 1 mo	0.0146520	0.0094499	2.7320675

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
285.03737143	276.60785866	0.00128503	MINIMUM
79.78290643	82.71224329	0.01742709	MINIMUM
3.04899241	0.58743737	0.09671504	SADDLE
181.97666246	178.91115159	0.14904484	SADDLE
359.69768111	176.88137722	1.92412504	SADDLE
179.42938871	356.60852540	2.13051972	MAXIMUM

Download:

MOID Plots

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